Vacuum cleaner tank portion



FIG. 1 is a front, right perspective view of a vacuum cleaner tank portion showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof; and,

FIG. 6 is a top view thereof.

The broken lines shown in the drawings are included for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a vacuum cleaner tank portion, as shown and described. 